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Finding the Third Proportional to 1,890 and 3,165

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Solution

The third proportional to 1,890 and 3,165 is: 5,300.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890 : 3,165 = 3,165 : x
  2. Step 2: Convert to fraction form
    1,890/3,165 = 3,165/x
  3. Step 3: Cross multiply
    1,890x = 3,165 × 3,165
  4. Step 4: Simplify right side
    1,890x = 10,017,225
  5. Step 5: Solve for x
    x = 10,017,225/1,890
  6. Step 6: Final answer
    x = 5,300.12

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.